Vermicomposting: How to get started
When beginning a vermicomposting bin, start by adding moist bedding -- things like shredded paper, dead leaves and other materials high in carbon (it's should mimic the worms' natural habitat, in dried leaves on a forest floor) -- into the bin, and add the worms to their new home. Bedding is the living medium for the worms but also a food source, so it should be moist (something like a wrung-out sponge) and loose to enable the earthworms to breathe and to facilitate aerobic decomposition. Other common bedding materials can be used including newspaper, sawdust, hay, cardboard, burlap coffee sacks and peat moss.
Most vermicomposters avoid using glossy paper from newspapers and magazines, junk mail and shredded paper from offices, because they may contain toxins, which aren't good for the system. Be wary of cardboard, as it cannot be used if it contains wax or plastic, which takes things like cereal boxes, and other boxes designed to hold food items, off the list.
A few tips: In warm climates, especially in the summer, keep the bin in the shade or away from midday direct sun -- just like compost, it should stay moist. Quantities of kitchen waste added depends on the size of the worm population; at first, feed the worms approximately one-half their body weight in kitchen scraps a day at most. That is, if you have one pound of worms, feed them about 1/2 pound of kitchen scraps each day. When they become more established, you can feed them closer to their entire body weight, though it's best to wait to add new food until the old food has been processed by the worms.
Troubleshooting odor and pests in vermiculture is similar to the same procedures used in composting; if the bin starts to stink, it's probably because there is too much nitrogen (which comes from "greens," which are things like grass clippings), so add some high-carbon "browns" (things like dead leaves and shredded paper), keeping the ratio the same as in conventional composting, about 30 parts carbon to one part nitrogen (see our piece on compost for more details on this). Rodents and flies are attracted by certain materials and odors, especially meat. This problem can be avoided by using a sealed bin, since the pests can't get at it, though simply avoiding animal products, rather than relying on special containers, is probably the easier way to go.
More info on vermicomposting
Check out Vermiculture.com, Earth911.org and Composters.com for more info, tips and tricks to vermiculture. For further info on TreeHugger, read how IKEA got worms, about Martha Stewart's support of it, how it fights climate change, and watch it in action with Amy Youngs' digestive table.